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Black mid-tower gaming PC with tempered glass side panel and liquid cooling visible inside

Adamant Custom

Adamant Custom Ryzen 9 9900X3D RTX 5090 64GB 8TB Gaming PC

SKU CH-QR0P-BGQ4D

A liquid-cooled workstation desktop with a 12-core Ryzen 9 9900X3D, RTX 5090 32GB GPU, 64GB DDR5 memory and 8TB NVMe storage running Windows 11 Pro

  • Release Year2026
  • TypeBusiness Desktops & Workstations
  • Form FactorTower
  • AI FeaturesAI Ready
  • UsageWorkstation
  • ColorBlack
  • 12-core Ryzen 9 9900X3D reaches 5.50 GHz for heavy compute
  • RTX 5090 32 GB handles 4K rendering and AI workloads
  • 64 GB DDR5 with four slots supports up to 192 GB total
  • Dual 4 TB Samsung 990 PRO drives deliver 7450 MB/s reads
  • 1200 W 80 PLUS Gold PSU powers every component with headroom

System identity

This is a tower workstation built around a 12-core AMD Ryzen 9 9900X3D processor and an Nvidia GeForce RTX 5090 graphics card. It ships with Windows 11 Pro, 64 GB of DDR5 memory and 8 TB of NVMe storage. Liquid cooling handles the CPU. It targets professionals who need modelling, rendering and AI compute in one box.

Deciding specification

The single figure that decides fit is the 32 GB frame buffer on the RTX 5090. That capacity lets large scenes and training batches stay resident on the GPU without spilling to system memory. If your workload fits in less VRAM, a smaller card will cost less; if it needs more, this system cannot expand the GPU memory.

Fit and alternatives

Suits creators and researchers who want a ready-to-run Windows workstation with high single-thread frequency and maximum VRAM in a single GPU. Not for buyers who need more than 32 GB of video memory, who require multiple GPUs, who want a rackmount chassis or who prefer to assemble their own loop.

Highlights

  • 12-core Ryzen 9 9900X3D reaches 5.50 GHz for heavy compute
  • RTX 5090 32 GB handles 4K rendering and AI workloads
  • 64 GB DDR5 with four slots supports up to 192 GB total
  • Dual 4 TB Samsung 990 PRO drives deliver 7450 MB/s reads
  • 1200 W 80 PLUS Gold PSU powers every component with headroom

Specifications

Release Year2026
TypeBusiness Desktops & Workstations
Form FactorTower
AI FeaturesAI Ready
UsageWorkstation
ColorBlack
Cooling SystemLiquid Cooling
Operating SystemWindows 11 Pro
Windows 11Ready
CPU TypeAMD Ryzen 9 9000 Series
CPU NameAMD Ryzen 9 9900X3D
CPU Socket TypeAM5
GPU/VGA TypeGeForce RTX 5090
Graphics InterfacePCI Express x16
Memory Capacity64GB DDR5
Memory Slots (Available/Total)4 total
Maximum Memory Supported192 GB
SSD8TB NVMe
HDDNo
Optical Drive TypeNo
Screen SizeNo Screen
Audio ChipsetIntegrated
Audio Channels7.1 channels
LAN ChipsetIntegrated
LAN Speed2.5Gbps
WLAN802.11be Wireless LAN
WiFi GenerationWi-Fi 7
BluetoothBluetooth 5.4
RJ451 port

Questions about this item

How does the 4.4 GHz base clock on the Ryzen 9 9900X3D behave once the CPU is inside a liquid-cooled tower?

The 12-core processor holds its 4.4 GHz base across sustained modelling or rendering loads, while the 240 mm AIO lets it reach 5.50 GHz boost without thermal throttling.

What does the PCI Express x16 graphics interface cap at for the RTX 5090 in this build?

The slot runs at PCIe 4.0 x16, so the RTX 5090 32 GB card operates at full bandwidth for 4K gaming and AI workloads.

Will the Antec P20 mid-tower case fit on a standard desk with its tempered glass panel?

At 469 mm deep, 220 mm wide and 490 mm high the case sits comfortably on most desks, and the front USB 3.2 Gen 2 Type-C port stays within easy reach.

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